Safety-razor-stropping device.



,498. PATENTED AUG. 11, 1908.

T, H. RANDOLPH. 1' RAZOR STROPPING DEVICE. APPLICATION FILED JULY 19, 1901.

SAPET 2 SHEETS-SHBBI l.

Safety-Razor-S troppin THOMAS HENRY RANDOLPH, or Lennon, ENGLAND.

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I No. seu,4ea.-

Specification of Letters Patent.

Patented Aug. 11, 1808.-

Application filed July s, 1901. Serial no. asters.

To all whom it may concern:

Be it known that I, THCMAS HENRY RAN- DOLPH, a subject of the Kin of England, residing at London, En lan have invented certain new and useiiil Improvements in Devices, of which the following is a speci cation.

This invention relates to improvements in safet razorstropping devices of the type in whic 1 the relative position of the blade and the strep is altered automatically at the end of each stroke by means of one or more lateral rollers each carrying atoot-hed segment engaging with a toothed pinion on the rotatable lade-su ort.

One 0 ect of this invention is to enable two cutting edges to be stropped at one operation and another object is to strep a double-edged razor blade on both cutting edges without removing the blade from the device. I

The invention is articularly suitable for stropping the thin 1 ouble-edge blades used in certain safety razors.

According to this invention, a frame having a handle at either end carries a blade-support journaled on its longitudinal axis and iavingatoothed pinion at one end. Rollers are arranged parallel with and close to either edge of the blade and each roller has a I toothed segment engaging the pinion. The

machine is placed so that it rests with its rollers on a strep and by means of the bandles is passed to and fro ever the strep (or vice vcrsa). By turning the device over so that the bladeholder is reversed the remaining faces can be shar )ened, the whole operation being erformcd without removing the blade from its support.

In an alternative form a sin le roller may be arranged )arallel with on close to one edge of the b ade and having-a toothed seg ment engaging the pinion. and a flexible strop may be passed to and fro over the roller so that the two sides of one cutting edge are alternately brought into contact with the stro as it is pulled to and fro.

"1" 1e blade-support according to this in vention comprises one plate attached to the journals or )ivot pins at the ends and a second plate lunged thereto at one end. Either plate, say the first, may be provided with projections to engage slots in the thin blade so as to determine its position, and the hinged plate may be folded down on tothe blade and held in place by a screw or by means of a spring or other catch. If desired, the lunged plate may be spring-controlled so that when too screw or catch is released the-s11 port springs open and releases the bluequickly.

One form of stropping device for thin double-edged safet -razor blades embodying this invention is il ustrated in the accompanying drawings.

Figure 1 is a perspective view of the complete machine as used according to one method. Fig. 2 is a detail view of the bladesupport, and Fig.3 is a diagrammatic illustration of a second method of using the machine.

Like letters indicate like parts throughout the drawings.

Between two side plates K a blade-suport C is pivoted on its longitudinal axis.

he so port'C comprises one plateB having journa s or pivot ms D at its ends and haw mg projections to engage the holes in a thin blade. A second plate A is hinged at one end F to plate B and is also provided with holes corresponding with those in the blade, and the plate A can be folded down and secured to the plate B so as to grip the razor blade in the middle and leave the two cutting edges ex )osed. A convenient form of catch for holding the plate A in its closed position consists of a screw H passing through the journal D at one end and arranged to engage a hole I in the end ofthe hinged plate A. The pivot pin D of the su port at one end carries a toothed pinion outside the side plate K. The plates A and B of the blade-support are made conveniently narrower than a razor blade. Journsled between the side plates K and arsllel to the blade-support C are two rollers J and M each of which carries a toothed segment N and O in engagement with the pinion J and the extent of the movement of these segments may be limited by stops P on the side late Beyond the rollers L rods R may e fixed between the side plates K and a handle or loop S may be attached to each end of the side plates.

There are various methods in which this device can be used. According to one method the device is laced so that it rests with its rollers L on tie strep T. The operator by the handles S runs the machine to and fro along the strop T. 'ith this an rangement one face of each cutting edge is v K. we

stropand sharpened in one operation, and to sharpen the two other faces on the opposite side of the blade it is only necessarytoreverse the device that is to turn the machine over on the strop, the handles S being made to swin round accordingly.

It wil be seen that there is another method of this device as illustrated in the diagrammatic view shown in Fig. 3. According to this method the device is hung up by means of one of the handles S and the strop T is passed between the rod R and roller M nearest the handle on which the frame is suported. Both sides of the strop are then eld taut and moved to and fro over the roller M so that opposite faces of each blade are sharpened simultaneously in each forward movement of the stro and also in each return movement thereo According to this method of using the device only one of the rollers is utilized.

In another method of using the apparatus one end of'the strop T is passed up between the roller L and the rod R and the other end of the stro assed up between the rollerO and the ro In this case the two faces of the opposite edges which lie on the same side of the blade are sharpened in one operation and to strop the remaining faces the device is reversed and the strop is passed downover the other side of the rollers.

It is to be understood that the details of arrangement and construction may be varied without departing from this invention.

What I claim as m invention and desire to secure b Letters atent is I. In a evice for stropping double-edged razor blades, the combination of a frame, a blade support journaled on its longitudinal axis in said frame and adapted to grip a double edged blade in the middle so as to leave the two cutting edges ex osed, a roller rotatably journaled in said rame parallel with the blade holder, means for transmit- 45 ting partial rotation from the roller to the blade-support, a strop, and means for caussaunas ing the two opposite cutting edges of the blade to contact alternately with the strop on relative reciprocal movement of the frame and strop.

2. In a razor blades the combination of a frame, a blade-support journaled on its longitudinal axis in said frame and adapted to grip a double-edged blade in the middle so as to leave the two cutting edges exposed, a toothed pinion at one end of said support, two rollers journaled in the frame parallel with and close to opposite sides of the blade support, a toothed segment on each roller engaging the said pinion and a strop which contacts with the rollers and alternately contacts with the opposite cutting edges of the blade on relative reciprocal movement of the frame and strop.

3. In a device for stroppingdouble-edged. razor blades, the combination of two side plates, distance rods connecting said plates, a blade -support comprising a main plate having ivot ins at its ends ,rotatahly mounts in theXside plates, projections on said main plate'to enga 'e holes in a doubleedged razor blade, aretaming plate hinged at one end to said main plate and adapted to grip the razor blade in the middle and leave the two cutting edges-exposed, a toethed' inion on one end of s. id support, two rollers JOUIIIitlCd between tli eside plates and parallel with and close to the opposite sides of the blade-support, a toothed segment on each roller engaging the said pinion, and a strop which contacts with the rollers and alternately contacts with the opposite cutting edges of the blade ,on relativereciproc movement of the frame and strop.

In testimonywhereofl have signed my name to this specification in the presence of two subscribing witnesses: THOMAS HENRY RANDOLPH.

Witnesses WILLIAM H. BALLAN'rYNE, HARRY B. Barnes.

device for stropping double-edge a 

